Suture passing and retrieval device

ABSTRACT

A surgical instrument has a suture passer/advanoer and a suture retriever manipulated from a common handle. The retriever is preferably a loop that closes around the suture advanced through it by the advancer. The loop is retracted to draw it around the suture. The retriever has a fork like distal end to readily advance and let go of the suture after it is in the loop of the retriever. The advancer and retriever can be manipulated longitudinally and rotationally with respect to a tubular body through which they extend so that the suture retriever can be passed through a needle pierced through tissue to be sutured, the suture may be advanced and guided into the retriever loop to be gripped. Retracting the instrument will cause one end of the suture to be pulled retrograde through the tissue.

FIELD OF THE INVENTION

The field of the invention is surgical instruments and more particularly instruments used to advance and retain a suture through tissue.

BACKGROUND OF THE INVENTION

Suture is commonly used during open and closed (endoscopic) surgery. One of the more challenging aspects of using suture is passing the suture through tissue to be sutured and retrieving the suture so that it can be tied to a selected location, to a suture anchor or otherwise manipulated to treat the target tissue.

Suture hooks are cannulated needles which are able to be pierced through tissue. One end of a length of suture may be passed through the lumen of the cannulated needle in antegrade fashion in order to pass the suture from a point exterior to the surgical work site and through the tissue to be sutured. The needle can then be removed and a suture snare, grasper or similar device may then be used to engage the end of suture passing through the tissue and position it also at an accessible point away from the work site near the other end of the suture. The two suture ends may then be tied or otherwise manipulated to treat the tissue. Such devices are commonly used during arthroscopic surgical procedures. The use of such known surgical instruments is complicated by the fact that they must be sequentially used thereby requiring extra steps and additional time which increases the overall complexity and duration of the surgical procedure. Other art in the field of the present invention is illustrated in U.S. Pat. No. 6,966,914 (Abe); U.S. Pat. No. 5,234,445 (Walker et al.); U.S. Pat. No. 3,877,434 (Ferguson et al.); U.S. Pat. No. 5,201,741 (Dulebohn) and U.S. Pat. No. 3,791,387 (Itoh).

Accordingly, it is an object of the present invention to produce a surgical instrument which combines the suture passing and suture retrieving functions.

SUMMARY OF THE INVENTION

A surgical instrument has a suture passer and a suture retainer manipulated from a common handle. The retainer is preferably a loop that closes around the suture advanced through it by the advancer. The loop is retracted to draw it around the suture. The retainer has a fork like distal end to readily advance and let go of the suture after it is in the loop of the retainer. The advancer and retainer can be manipulated longitudinally and rotationally with respect to a tubular body through which they extend so that the advanced suture can be guided into the loop to be gripped.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a suture passer/retriever instrument constructed in accordance with the principles of this invention showing components extending from the distal tip of the instrument.

FIG. 2 shows a view of the distal end of the instrument of FIG. 1 after it has penetrated through tissue to be sutured.

FIG. 3 is a view of the distal end of the instrument of FIG. 1 showing the configuration of components during use of the instrument.

FIG. 4 is another view of the distal end of the instrument showing the configuration of components during use of the instrument.

FIGS. 5 through 7 are views showing various configurations of the components of the instrument during other stages of the method of using the instrument.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 shows a preferred embodiment of a suture passer/retriever instrument 1 constructed in accordance with the principles of this invention. Instrument 1 comprises a handle 2 having a dual lumen tubular member extending from its distal end. Handle 2 further comprises a first thumb/finger actuator or slide 4 and a second thumb/finger actuator or slide 10 for controlling movement of other components of instrument 1 as will be understood below.

Tubular member 3 in the preferred embodiment comprises a first cylindrical tube 3 a and a second cylindrical tube 3 b, both tubes being joined together in parallel alignment. Alternatively, tubular member 3 could be a single cylindrical or tubular tube containing two parallel lumens within its interior.

Tubular member 3 a is provided at its distal end with a curved cannulated needle tip 6 aligned with the lumen of tube 3 a. It will be understood that the size of the tubular member 3 and the curvature of needle tip 6 is small enough to enable the distal end of instrument 1 to pass through a cannula or portal used to access the surgical work site during arthroscopic or other endoscopic procedures. The needle tip 6 has a sharpened distal end adapted to pierce tissue to be sutured. Tubular member 3 a and needle tip 6 are adapted to slidably receive a suture retrieving member 9 which comprises a distal loop 9 a and a body portion (not shown) attaching the loop to thumb/finger actuator 4. It will be understood that FIG. 1 shows retrieving member 9 extended somewhat. When actuator 4 is in its proximal-most position loop 9 a will normally be fully retracted into the lumen within tubular member 3 a. In this position, needle tip 6 may pierce tissue without interference from loop 9 a.

Tubular member 3 b is adapted to slidably receive a suture advancer or push rod 11 which is provided at its distal tip with a suture retainer which in the preferred embodiment is in the form of a U-shaped clip 8 which may be further in the form of a narrowed slot adapted to frictionally engage suture 12. The push rod 11 may be in any suitable form such as, for example, a flat ribbon, a tubular shaft, a solid rod of predetermined cross-section, etc. Push rod 11 is connected at its proximal end to thumb/finger actuator 10 which is slidable between a proximal-most position in which push rod 11 and clip 8 are retracted entirely within the lumen of tubular member 3 b and a distal-most position in which push rod 11 is extended from the lumen as will be understood below. It will be understood that the configuration of instrument 1 prior to its actual use in a surgical procedure would include both thumb/finger actuators preferably being retracted entirely within their respective lumens.

The operation of the invention will best be understood by reference to FIGS. 2 through 7. As shown in FIG. 2, needle tip 6 is pierced through tissue 13 at a location where the surgeon desires to pass suture. At this stage, push rod 11 is retracted within the lumen of tubular member 3 b and suture 12 is engaged within suture clip 8. It will be understood that suture clip 8 may engage a length of suture at any point intermediate the ends of the suture to be passed. Preferably clip 8 engages suture near one of the ends of the suture as will be understood below. The portions of suture 12 are guided proximally from clip 8 either within the lumen of tubular member 3 b or along the exterior of tubular member 3 in order to avoid becoming tangled and/or interfering with the surgical procedure. The distal end of tubular member 3 b is provided with a notch 7 to accommodate the suture.

As shown in FIG. 3, once the needle tip 6 has pierced tissue 13, the opening 20 of the needle will be exposed above the surface of the tissue and actuator 4 may then be pushed distally in order to advance suture loop 9 a along one predetermined path so that it can automatically open up when unrestrained by the lumen of needle 6. It will be understood that suture retriever loop 9 a may be made of a shape-memory material such as Nitinol so that it will adopt a preformed shape once it is released from the needle. In the preferred embodiment loop 9 a is preformed into the shape of a diamond although it will be understood that a variety of shapes would be suitable provided the loop can be collapsed onto the suture and into the lumen of the needle.

When loop 9 a is satisfactorily positioned above tissue 13, push rod 11 is pushed distally by distal motion of actuator 10. Referring now to FIG. 4, it will be understood that further distal extension of push rod 11 causes it to extend along another predetermined path into the path of suture retrieving member 9 and through loop 9 a. Push rod 11 is formed of a shape retaining material such as Nitinol so that its distal end will automatically curve as required (as it exits the lumen) to follow a path designed to intersect the path of suture retrieving member 9 and to place the suture through loop 9 a.

As shown in FIG. 5, once push rod 11 has been advanced sufficiently to position suture clip 8 distally of loop 9 a, suture retrieving member 9 can be retracted by the proximal motion of actuator 4 so that loop 9 a can, as it is compressed by the lumen of the needle tip, collapse around suture 12 and push rod 11.

As shown in FIG. 6, once loop 9 a has been collapsed around suture 12, push rod 11 may be retracted by the proximal motion of actuator 10 in order to disengage clip 8 from suture 12, allowing only the suture to remain within loop 9 a. Suture retrieving member 9 is retracted sufficiently to enable it to securely retain suture 12 while needle tip 6 is retracted from tissue 13 as shown in FIG. 7 to pull the suture through the tissue in retrograde fashion. Instrument 1 may then be removed from the work site thereby pulling one or both ends of suture 12 through tissue 13 as far as desired by the surgeon. Preferably, only one end of suture 12 would then be completely pulled through the tissue thereby enabling tissue 13 to be tied to a desired location in a conventional manner.

While shown in a straight configuration, it will be understood that tubular members 3 a and 3 b could be curved to facilitate access to certain work sites. The body portions of push rod 11 and suture retriever 9 are flexible enough to curve within the lumens of the tubular members and needle tip 6, which itself can be shaped into a variety of curvatures of varying degrees.

It will be understood by those skilled in the art that numerous improvements and modifications may be made to the preferred embodiment of the invention disclosed herein without departing from the spirit and scope thereof. 

1. A surgical instrument for manipulating a suture comprising: an elongated body; a suture advancer and a suture retriever movably mounted to said body.
 2. The instrument of claim 1 wherein: said suture advancer is movable with respect to said body to approach said suture retriever.
 3. The instrument of claim 2 wherein: the path of said suture advancer can selectively intersect with said suture retriever.
 4. The instrument of claim 3 wherein: said suture retriever comprises a movable gripper.
 5. The instrument of claim 4 wherein: said suture retriever is movable with respect to said body.
 6. The instrument of claim 5 wherein: said gripper is actuated by movement of said suture retriever with respect to said body.
 7. The instrument of claim 6 wherein: said gripper defines a loop that gets smaller when said suture retriever is moved longitudinally with respect to said body.
 8. The instrument of claim 7 wherein: said suture advancer is movable longitudinally or rotationally with respect to said body for selective entry into said loop.
 9. The instrument of claim 8 wherein: said suture advancer is movable longitudinally and rotationally with respect to said body for selective entry into said loop.
 10. The instrument of claim 9 wherein: said suture retriever is movable longitudinally or rotationally with respect to said body.
 11. The instrument of claim 10 wherein: said suture retriever is movable longitudinally and rotationally with respect to said body.
 12. The instrument of claim 11 wherein: said body comprises an elongated tubular structure and at least one of said suture advancer and said suture retriever pass therethrough.
 13. The instrument of claim 12 wherein: said body comprises an elongated tubular structure and both said suture advancer and said suture retriever pass therethrough.
 14. The instrument of claim 13 wherein: said body comprises a handle on a proximal end thereof through which said suture advancer and said suture retriever can be manipulated with respect to a distal end of said tubular.
 15. The instrument of claim 14 wherein: said tubular structure comprises discrete passages for said suture advancer and for said suture retriever.
 16. The instrument of claim 15 wherein: said suture advancer is formed having a u-shape at a distal end thereof for easy release of a suture after said advancer is beyond said loop.
 17. A suture passer comprising: a tubular member having a first lumen and a second lumen parallel to said first lumen, said first lumen having proximal and distal ends and said second lumen having proximal and distal ends; a first member having a proximal and distal end, said first member having a collapsible loop at its distal end and slidably situated within said first lumen, said first member adapted to be controlled from its proximal end to enable said collapsible loop to extend from said first lumen along a first predetermined path; a second member having a proximal and distal end, said second member having a suture engaging means at its distal end and slidably situated within said second lumen, said second member adapted to be controlled from its proximal end to extend from said second lumen along a predetermined path which intersects said first predetermined path to enable its distal end to extend through said collapsible loop; and a suture having a portion releasably engaged by said suture engaging means whereby, when said first member is deployed from said first lumen and said second member is deployed from said second lumen and said first member is retracted into said first lumen, said suture will be grasped within said collapsible loop.
 18. A suture passer according to claim 17 further comprising: a first actuating means attached to the proximal end of said first member for slidably moving said first member relative to said first lumen; a second actuating means attached to the proximal end of said second member for slidably moving said second member relative to said second lumen.
 19. A suture passer comprising: a tubular member having a first lumen and a second lumen parallel to said first lumen, each of said first and second lumens having proximal and distal ends; a suture to be placed at a surgical site; a suture advancing member for advancing a portion of said suture through said first lumen and distally beyond said distal end of said first lumen along a projected/predetermined path; a suture retrieving member slidably retained within said second lumen, said suture retrieving member having a looped distal end adapted to extend from said distal end of said second lumen and to intersect said predetermined path of said suture advancing member; means for retracting said suture retrieving member to engage said suture advancing member and suture; means for retracting said suture advancing member from engagement with said suture retrieving member while leaving said suture engaged with said suture retrieving member.
 20. A suturing method comprising: advancing a suture through tissue with an instrument; retrieving said suture after said advancing with the same instrument.
 21. The method of claim 17 comprising: accomplishing both said advancing and said retrieving from controls mounted to a single handle for said instrument.
 22. The method of claim 18 comprising: providing a movably mounted suture advancer and a movably mounted suture retriever on the instrument; advancing a suture with said advancer into a gripper of said suture retriever.
 23. The method of claim 19 comprising: steering a suture with said advancer into a loop acting as said gripper; and reducing the size of said loop around the suture to grip it by retracting said suture retriever into a tubular body of the instrument. 